Skip the auto shop - Our mechanics make house calls

Q: Engine light is on and sometimes the power in the engine reduces

asked by on

Sometimes my engine light comes on my dash board on my Chevrolet Captiva. I have just had the car fully serviced and tuned. They could not find the problem with the engine light but they say that it could be a problem with the accelerator pedal and this needs to be changed. Is this correct?

When driving the car the engine light comes on and then the power of the engine reduces. Sometimes when i start the car the accelerator on the dash board / speedometer goes up without me putting my foot on the accelerator.

Please can you explain what the problem is and how to fix?

My car has 120000 miles.
My car has an automatic transmission.

A: I believe that the speedometer needle going...

I believe that the speedometer needle going up as the car is started is a factory feature that was added by Chevrolet on purpose. As for the acceleration issue, I would recommend having the vehicle scanned for trouble codes with an OBD-2 scanner. This will inform you of the malfunction that the PCM is reporting and can help lead you in the right direction towards locating the failed part. Once the part failure has been determined, the replacement procedure will be more clear to the technician performing the service. I don’t recommend following through with any repairs unless the technician makes a clear reading and diagnosis of the Check Engine code.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: I have an automatic but also has the 6 speed manual. When I'm towing my 4000lb camper the truck RPMs at 2800 and only 100m/h

When a truck is towing a trailer or a fifth wheel, the engine will need to be producing maximum torque. The highest gear in most transmissions is the overdrive gear. The lowest gear typically produces the most torque from the...

Q: Reduced engine power warning on, disabled throttle

There is a common issue among vehicles of this year model with the throttle position sensors on the throttle bodies. The reduced engine power warning may have also illuminated the Check Engine Light and stored a faults code. I suggest...

Q: Changing spark plugs on a 2007 Chevy Uplander

Yes, I take out the pack and go by feel. Do it when it's cold. Sometimes if they are really hard to get, I get them from the bottom. Jack it up and move the bottom to get to them....

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...